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Quasi-Solid-State Sodium-Ion Full Battery with High-Power/Energy Densities

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journal contribution
posted on 02.05.2018, 00:00 by Jin-Zhi Guo, Ai-Bo Yang, Zhen-Yi Gu, Xing-Long Wu, Wei-Lin Pang, Qiu-Li Ning, Wen-Hao Li, Jing-Ping Zhang, Zhong-Min Su
Developing a high-performance, low-cost, and safer rechargeable battery is a primary challenge in next-generation electrochemical energy storage. In this work, a quasi-solid-state (QSS) sodium-ion full battery (SIFB) is designed and fabricated. Hard carbon cloth derived from cotton cloth and Na3V2(PO4)2O2F (NVPOF) are employed as the anode and the cathode, respectively, and a sodium ion-conducting gel-polymer membrane is used as both the QSS electrolyte and separator, accomplishing the high energy and power densities in the QSS sodium-ion batteries. The energy density can reach 460 W h kg–1 according to the mass of the cathode materials. Moreover, the fabricated QSS SIFB also exhibits an excellent rate performance (e.g., about 78.1 mA h g–1 specific capacity at 10 C) and a superior cycle performance (e.g., ∼90% capacity retention after 500 cycles at 10 C). These results show that the developed QSS SIFB is a hopeful candidate for large-scale energy storage.